Q 01/05

The left lung is the smaller one, to leave room for which organ?

A) Heart

B) Stomach

C) Spleen

D) Liver

Answer · why

A) Heart

Heart. It sits left of centre and fits into a dent in the left lung called the cardiac notch, so that lung holds less air than its shorter, wider part...

Q 02/05

Which blood cells pick up oxygen in the lungs and carry it to the rest of the body?

A) White blood cells

B) Red blood cells

C) Platelets

D) Plasma cells

Answer · why

B) Red blood cells

Red blood cells. They have no nucleus and no mitochondria, so they burn none of the oxygen they carry and can deliver every bit of it to the tissues.

Q 03/05

What is the common name for the trachea?

A) The gullet

B) The tonsils

C) The windpipe

D) The breastbone

Answer · why

C) The windpipe

The windpipe. If the throat above it is blocked, a surgeon can cut a small hole into it at the front of the neck, a tracheostomy, and the patient brea...

Q 04/05

Which first-aid technique, named for an American surgeon, uses abdominal thrusts to clear a choking person's airway?

A) The Valsalva maneuver

B) The Epley maneuver

C) The Heimlich maneuver

D) The recovery position

Answer · why

C) The Heimlich maneuver

The Heimlich maneuver. Henry Heimlich described it in 1974, and in 2016, aged 96, he said he had used it himself to save a choking woman at his retire...

Q 05/05

What shape are the cartilage hoops of the trachea?

A) Complete and O-shaped

B) Incomplete and C-shaped

C) Spiral coils

D) Flat square plates

Answer · why

B) Incomplete and C-shaped

Incomplete and C-shaped. The gap at the back is bridged by a muscle that tightens during a cough, narrowing the tube to help force the air out.